Nice, the mood being 'out of control' was quite clever way of interpreting the theme!
Out of all four moods, I think the joy is the my favourite mood.. It feels great to dash through the books while emitting some fancy trails.
My little feedback is that it would be good to add some sort of indications before switching to next mood, especially on the 'joy' mood where you have to run into enemies but then you could sometimes switch to next mood while you're in middle of dashing through enemies & take some damage.
I know that's not quite realistic (y'know.. mood swings doesn't have any sort of convenient indications) but for the sake of gameplay, I think this would let the players to prepare & plan out their next strategy and make the gameplay more fair & interesting.